/Engine/Plugins/Runtime/GameplayAbilities/Source/GameplayAbilities/Public/GameplayEffectAggregator.h
Add a modifier to the channel
void AddMod ( float EvaluatedMagnitude, [TEnumAsByte](API\Runtime\Core\Containers\TEnumAsByte)< [EGameplayModOp::Type](API\Plugins\GameplayAbilities\EGameplayModOp__Type) > ModOp, const [FGameplayTagRequirements](API\Plugins\GameplayAbilities\FGameplayTagRequirements) * SourceTagReqs, const [FGameplayTagRequirements](API\Plugins\GameplayAbilities\FGameplayTagRequirements) * TargetTagReqs, bool bIsPredicted, const [FActiveGameplayEffectHandle](API\Plugins\GameplayAbilities\FActiveGameplayEffectHandle) & ActiveHandle )